參數(shù)資料
型號: SY89531LHZ
廠商: MICREL INC
元件分類: 時鐘產(chǎn)生/分配
英文描述: 622.08 MHz, OTHER CLOCK GENERATOR, PQFP64
封裝: LEAD FREE, TQFP-64
文件頁數(shù): 7/16頁
文件大小: 105K
代理商: SY89531LHZ
15
Precision Edge
SY89531L
Micrel, Inc.
M9999-010808
hbwhelp@micrel.com or (408) 955-1690
R2
82
R2
82
ZO = 50
+3.3V
Vt = VCC –2V
R1
130
R1
130
+3.3V
“Source”“Destination”
Figure 6. PECL Parallel Termination Thevenin Equivalent (Note 1)
ZO = 50
50
50
50
+3.3V
“Source”“Destination”
Rb
C1 (optional)
0.01
F
Figure 7. LVPECL Three-Resistor “Y-Termination” (Notes 1, 2, 3)
ZO = 50
+3.3V
Source
Destination
50
50
Figure 8. HSTL Differential Termination (Note 1)
Note 1.
Place termination resistors as close to destination inputs as possible.
Note 2.
PECL Y-termination is a power-saving alternative to Thevenin termination.
Note 3.
R
b resistor sets the DC bias voltage, equal to Vt. For +3.3V systems Rb = 46 to 50.
OUTPUT TERMINATION RECOMMENDATIONS
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